Ventilator.



No. 771,449. PATENTED OCT. 4, 1904.

C. A. WITHERS.

I 1 VENTILATOR.

APPLIOATION FILED MAY 22, 1903. RENEWED MAY 17, 1904.

N0 MODEL.

UNITED STATES Patented October 4, 1904.

PATENT OFFICE.

CHARLES A. WITHERS, OF AUGUSTA, GEORGIA, ASSIGNOR TO INTER- NATIONALVENTILATOR AND DEFLECTOR COMPANY, OF WVASHINC- TON, DISTRICT OFCOLUMBIA, A CORPORATION OF THE DISTRICT OF COLUMBIA.

VENTILATOR.

SPECIFICATION forming part of Letters Patent No. 771,449, dated October4, 1904.

Application filed May 22, 1903. Renewed May 17, 1904, Serial No.208,473. (No model.)

To all whom it may concern:

Be it known that I, CHARLES A. WITHERS, a citizen of the United Statesof America, residing at Augusta, in the county of Richmond and State ofGeorgia, have invented certain new and useful Improvements inVentilators, of which the following is a specification.

This invention relates to certain new and useful improvements inventilators, and is particularly adapted for use in connection with anyinclosed space where it is desirable to withdraw foul or vitiated air.

The object of theinvention is to provide new and novel means, ashereinafter more specifically set forth, and illustrated in theaccompanying drawings, which is adapted when in use for creating aninduced current of air therethrough, thereby withdrawing the foul,vitiated, or heated air from the structure to which the ventilator isattached.

The invention further aims to construct a ventilator which shall beextremely simple in its construction, strong, durable, efficient in itsuse, and comparatively inexpensive to set up.

With the foregoing and other objects in view the invention consists ofthe novel combination and arrangement of parts hereinafter morespecifically described, illustrated in the accompanying drawings, andparticularly pointed out in the claim hereunto appended.

In describing the invention in detail reference is had to theaccompanying drawings, forming a part of this specification, whereinlike reference characters denote corresponding parts throughout bothviews, and in which- Figure 1 is an elevation of the ventilator, itsshaft broken away; and Fig. 2 is a sectional elevation thereof.

Referring to the drawings by reference characters, 1 denotes the bodyportion or shaft of the ventilator, which is preferably cylindrical incontour and communicates with the interior of the structure to which theventilator is attached. The shaft 1 may communicate with the interior ofthe structure which is to' be ventilated by a suitable conduit, (notshown,) the shaft or body portion 1 being attached to the conduit in anysuitable manner. At the top of the shaft 1 and surounding the same, aswell as being secured to the shaft in any suitable manner, is asubstantially truncated-cone-shaped collar 2, the inclination of thecollar being such that it will extend inwardly and upwardly at aninclination and terminate at its inner end against the top edge of theshaft or body portion 1. Superposed above the collar 2 is V-shapedcollar 3, the collar 3 being supported, in a manner as hereinafterreferred to, a suitable distance above the collar 2 and top of the shaft1, and the inner section of the collar 3 projects over the mouth of thebody portion or the shaft 1. The collar 3 is formed with What may betermed two sections, the outer section extending downwardly and inwardlyat an inclination and the inner section extending inwardly and upwardlyat an inclination. The collars 2 and 3 are adapted to form anair-passage the walls of which are inclined and the inner or dischargeend thereof contracted. Supported above the collar 3 in a mannerhereinafter referred to is the cap or hood ofthe ventilator, which isindicated by the reference character 4 and is substantially cone-shapedin contour and its lower portion of such diameter as to project over thecollars 2 and 3. The inner face of the cap or hood 4 has secured theretoan inverted-cone-shaped deflector 5, which is arranged directly over anda suitable distance .above the mouth 'of the shaft or body portion 1.The collar 3 and hood or cap 1 are supmeans than that as shown may beemployed for securing and retaining the collar 3 and hood or cap 4 inposition; but that as shown is the preferred one.

The passage of the.air-currents is indicated by the arrows in Fig. 2.

The operation of the ventilator is as follows: The wind passing throughthe air-passage formed by the collars 2 and 3 is compressed in the saidpassage, whereby its power and speed will be increased and it produces apowerful suction at the mouth of the shaft or body portion 1, whereby aninduced upward cur rent of air is created in the body portion whichcommunicates with the inclosed space being ventilated, therebywithdrawing the foul, vitiated, or heated air therefrom. The air will beforced against the deflector 5 and deflected out between the hood or cap4 and collar 3, as indicated by the arrow in Fig. It will be evidentthat the hood or cap 4 will prevent rain, snow, sleet, or other foreignmatter entering the shaft or body portion 1, and it will also be evidentthat the hood 4 can be dispensed with and the ventilator operated in asatisfactory manner.

It is thought the many advantages of my improved ventilator can bereadily understood from the foregoing description, taken in connectionwith the accompanying drawings, and it will furthermore be evident thatchanges, variations, and modifications can be resorted to withoutdeparting from the spirit of the invention or sacrificing any of itsadvantages, and I. therefore do not wish to restrict myself to thedetails of construction hereinbefore described and as shown in theaccompanying drawings, but reserve the right to make such changes,variations, and modifications as come properly within the scope of theprotection prayed.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

A ventilator comprising a shaft, a truncatedcone-shaped collar connectedto the top thereof, a collar substantially \/-shaped in crossscctionarranged above said truncated-coneshaped collar and having the innersection thereof projecting over the mouth of the shaft, a cone-shapedhood arranged above said V- shaped collar and of a greater diameter thanthe outer section of the V-shaped collar and said truncated-cone-shapedcollar, said hood having an inverted-cone-shaped deflector secured tothe inner face thereof, and a series of supporting-standards connectedattheir lower ends to the upper face of said truncatedcone-shapedcollar, extending through and secured to the inner face of the outersection of the V-shaped collar and extending upwardly in said hood andsecured at their upper ends to the inner face of the hood, substantiallyas herein shown and described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

CHARLES A. XVITHERS.

\Vit-nesses:

N. L. BOGAN, Geo. W. REA.

